HEAD-MOUNTED DEVICE FOR CAPTURING PULSE DATA

• US 20180206735A1
• Filed: 06/15/2017
• Published: 07/26/2018
• Est. Priority Date: 01/26/2017
• Status: Active Application

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: HOLZ, Christian, WANG, Edward Jay
• Application Number:
  US15/624,602
• Publication Number:
  US 20180206735A1
• Time in Patent Office: Days
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 2562/0223 Magnetic field sensors
• CPC Class Codes: A61B 5/0015 characterised by features of the telemetry system
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/02125 of pulse wave propagation time
• CPC Class Codes: A61B 5/02141 Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits A61B5/02233, A61B5/0235 take precedence
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/6803 Head-worn items, e.g. helmets, masks, headphones or goggles
• CPC Class Codes: A61B 5/7282 Event detection, e.g. detecting unique waveforms indicative of a medical condition A61B5/4094, A61B5/4818, A61B5/349, A61B5/0823 take precedence

Abstract

Examples are disclosed herein related to a head-mounted device, such as wearable eyeglasses, to continuously monitor pulse data and blood pressure data. One example provides a head-mounted device, comprising a first optical sensor positioned to measure pulse data at a first arterial location that is a first distance from a heart, a second optical sensor spaced apart from the first optical sensor and positioned to measure pulse data at a second arterial location that is a second, different distance from the heart, and a controller wired to the first optical sensor and the second optical sensor and configured to determine blood pressure data from the pulse data measured by the first optical sensor and the second optical sensor.

Claims

1. A head-mounted device, comprising:

a first optical sensor positioned to measure pulse data at a first arterial location that is a first distance from a heart;

a second optical sensor spaced apart from the first optical sensor and positioned to measure pulse data at a second arterial location that is a second, different distance from the heart; and

a controller wired to the first optical sensor and the second optical sensor and configured to determine blood pressure data from the pulse data measured by the first optical sensor and the second optical sensor.

2. The head-mounted device of claim 1, wherein one or more of the first optical sensor and the second optical sensor is positioned to measure pulse data at an angular artery.

3. The head-mounted device of claim 1, wherein one or more of the first optical sensor and the second optical sensor is positioned to measure pulse data at an occipital artery.

4. The head-mounted device of claim 1, wherein one or more of the first optical sensor and the second optical sensor is positioned to measure pulse data at a superficial temporal artery.

5. The head-mounted device of claim 1, further comprising a third optical sensor positioned to measure pulse data at a third arterial location that is a third distance from the heart.

6. The head-mounted device of claim 1, further comprising a motion sensor configured to monitor motion data of a wearer of the head-mounted device.

7. The head-mounted device of claim 6, wherein the controller is configured to determine correlation data regarding the blood pressure data and the motion data of the wearer.

8. The head-mounted device of claim 1, wherein the first optical sensor and the second optical sensor are configured to measure pulse arrival times at the first and second arterial locations, and the controller is configured to determine pulse transit time based on the pulse arrival times.

9. The head-mounted device of claim 8, wherein the controller is configured to determine changes in blood pressure based upon changes in the pulse transit time.

10. The head-mounted device of claim 1, wherein the head-mounted device comprises an eyeglass device.

11. A head-mounted device, comprising:

a first optical sensor positioned to measure pulse data at a first arterial location that is a first distance from a heart;

a second optical sensor spaced apart from the first optical sensor and positioned to measure pulse data at a second arterial location that is a second, different distance from the heart;

a motion sensor configured to monitor motion data of a wearer; and

a controller wired to the first optical sensor and the second optical sensor and configured to determine blood pressure data from the pulse data measured by the first optical sensor and the second optical sensor, and to determine correlation data regarding the blood pressure data and the motion data of the wearer.

12. The head-mounted device of claim 11, wherein one or more of the first optical sensor and the second optical sensor is positioned to measure pulse data at an angular artery.

13. The head-mounted device of claim 11, wherein one or more of the first optical sensor and the second optical sensor is positioned to measure pulse data at an occipital artery.

14. The head-mounted device of claim 11, wherein one or more of the first optical sensor and the second optical sensor is positioned to measure pulse data at a superficial temporal artery.

15. The head-mounted device of claim 11, wherein the first optical sensor and the second optical sensor are configured to measure pulse arrival times at the first and second arterial locations, and the controller is configured to determine pulse transit time based on the pulse arrival times.

16. The head-mounted device of claim 15, wherein the controller is configured to determine changes in blood pressure based upon changes in the pulse transit time.

17. The head-mounted device of claim 11, wherein the head-mounted device comprises an eyeglass device.

18. A wearable eyeglass device, comprising:

a first optical sensor positioned to measure pulse data at an angular arterial location on a head;

a second optical sensor spaced apart from the first optical sensor and positioned to measure pulse data at a superficial temporal arterial location on the head; and

a controller wired to the first optical sensor and the second optical sensor and configured to determine blood pressure data from the pulse data measured by the first optical sensor and the second optical sensor.

19. The wearable eyeglass device of claim 18, further comprising a motion sensor configured to monitor motion data of a wearer of the head-mounted device.

20. The wearable eyeglass device of claim 19, wherein the controller is configured to determine correlation data regarding the blood pressure data and the motion data of the wearer.